Drivers of metacommunity structure diverge for common and rare Amazonian tree species

da Conceição Bispo, Polyanna and Balzter, Heiko and Malhi, Yadvinder and Ferry Silk, J. W. and Santos, João Roberto dos and Renno, Camilo Daleles and Espirito-Santo, Fernando and Aragão, Luiz and Ximenes, Arimatea C. and da Conceição Bispo, Pitágoras (2017) Drivers of metacommunity structure diverge for common and rare Amazonian tree species. PLoS ONE, 12 (11): e0188300. ISSN 1932-6203

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We analysed the flora of 46 forest inventory plots (25 m x 100 m) in old growth forests from the Amazonian region to identify the role of environmental (topographic) and spatial vari- ables (obtained using PCNM, Principal Coordinates of Neighbourhood Matrix analysis) for common and rare species. For the analyses, we used multiple partial regression to partition the specific effects of the topographic and spatial variables on the univariate data (standard- ised richness, total abundance and total biomass) and partial RDA (Redundancy Analysis) to partition these effects on composition (multivariate data) based on incidence, abundance and biomass. The different attributes (richness, abundance, biomass and composition based on incidence, abundance and biomass) used to study this metacommunity responded differently to environmental and spatial processes. Considering standardised richness, total abundance (univariate) and composition based on biomass, the results for common species differed from those obtained for all species. On the other hand, for total biomass (univariate) and for compositions based on incidence and abundance, there was a correspondence between the data obtained for the total community and for common spe- cies. Our data also show that in general, environmental and/or spatial components are important to explain the variability in tree communities for total and common species. How- ever, with the exception of the total abundance, the environmental and spatial variables measured were insufficient to explain the attributes of the communities of rare species. These results indicate that predicting the attributes of rare tree species communities based on environmental and spatial variables is a substantial challenge. As the spatial component was relevant for several community attributes, our results demonstrate the importance of using a metacommunities approach when attempting to understand the main ecological pro- cesses underlying the diversity of tropical forest communities.

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Journal Article
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Uncontrolled Keywords:
?? amazontropical forestsremote sensingecologygeneral agricultural and biological sciencesgeneral biochemistry,genetics and molecular biologygeneral medicineagricultural and biological sciences(all)biochemistry, genetics and molecular biology(all)medicine(al ??
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20 Apr 2018 12:36
Last Modified:
16 Jul 2024 10:42